This cross-disciplinary book offers a broad spectrum of essays on important aspects of the political, social, religious and historical importance of the Islamic-Byzantine border between 630-c.1300CE, and in particular on the manifold ways in which the Islamic-Byzantine border affected the internal development and culture of each of the two civilisations. The chapters are written by twelve of the leading scholars in the field, including experts on both the Byzantine Empire and the Islamic world, and explore developments ranging from anti-government riots and dynastic revolutions to the border's influence on religious law, apocalyptic literature, population policy and heroic culture.